Hi Vincent, kernel test robot noticed the following build warnings:
[auto build test WARNING on e2412e51fdea837b50ce31fea8e5dfc885237f3a] url: https://github.com/intel-lab-lkp/linux/commits/Vincent-Donnefort/ring-buffer-Zero-ring-buffer-sub-buffers/20240206-004413 base: e2412e51fdea837b50ce31fea8e5dfc885237f3a patch link: https://lore.kernel.org/r/20240205163410.2296552-5-vdonnefort%40google.com patch subject: [PATCH v14 4/6] tracing: Allow user-space mapping of the ring-buffer config: arc-defconfig (https://download.01.org/0day-ci/archive/20240206/202402061809.t2cv9j8w-...@intel.com/config) compiler: arc-elf-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240206/202402061809.t2cv9j8w-...@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202402061809.t2cv9j8w-...@intel.com/ All warnings (new ones prefixed by >>): kernel/trace/trace.c: In function 'tracing_buffers_mmap_close': >> kernel/trace/trace.c:8722:29: warning: unused variable 'tr' >> [-Wunused-variable] 8722 | struct trace_array *tr = iter->tr; | ^~ kernel/trace/trace.c: In function 'tracing_buffers_mmap': kernel/trace/trace.c:8752:29: warning: unused variable 'tr' [-Wunused-variable] 8752 | struct trace_array *tr = iter->tr; | ^~ vim +/tr +8722 kernel/trace/trace.c 8717 8718 static void tracing_buffers_mmap_close(struct vm_area_struct *vma) 8719 { 8720 struct ftrace_buffer_info *info = vma->vm_file->private_data; 8721 struct trace_iterator *iter = &info->iter; > 8722 struct trace_array *tr = iter->tr; 8723 8724 ring_buffer_unmap(iter->array_buffer->buffer, iter->cpu_file); 8725 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
